![]() ![]() Paroxysmal atrial fibrillation is often described as beats irregular in both rhythm and strength, whereas sinus tachycardia is of gradual onset and offset with a regularly increasing and decreasing heart rate. Polyuria may follow paroxysmal supraventricular tachycardia. Single "skips" suggest isolated premature extrasystoles, whereas the abrupt onset and termination of rapid, regular palpitations characterize paroxysmal supraventricular or ventricular tachycardia. Once a cardiac origin is suspected, the detailed history may provide clues as to the type of arrhythmia. In yet other cases, a noncardiac vascular origin of the symptom may exist, as in hypertension, aortic regurgitation, and tricuspid regurgitation with exaggerated pulsations of the arterial or venous systems. A fleeting "sinking" feeling may also be described this is particularly common in patients with isolated extrasystoles and may correspond to the post-extrasystolic compensatory pause.Ī report of seeing the chest move or "flutter" may suggest chest wall muscle fasciculations. Any of these may reflect a cardiac irregularity. Terms commonly used include "skip beats," "racing," "pounding," "fluttering," as well as numerous others. These range from a nonspecific cardiac awareness to discrete episodes of rapid beats. Various terms may be used to describe the sensation. The history of palpitations may provide information as to the cardiac origin of the sensation, the type of rhythm disturbance responsible, and the clinical significance of the symptom. ![]()
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